—What’s that noise?—Oh，I forget to tell you.The new machine________.A．is testing_刷题宝

题干

—What’s that noise?
—Oh，I forget to tell you.The new machine________.

A．is testing	B．was being tested
C．is being tested	D．has been tested

上一题下一题 0.65难度单项选择更新时间:2017-06-02 02:23:44

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